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SELECT
CASE
WHEN (A + B <= C) OR (A + C <= B) OR (B + C <= A) THEN "Not A Triangle"
WHEN (A = B) AND (A = C) AND (B = C) THEN "Equilateral"
WHEN (A = B) OR (B = C) OR (A = C) THEN "Isosceles"
WHEN (A != B) AND (A != C) AND (B != C) THEN "Scalene"
END AS triangletype
FROM TRIANGLES
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Type of Triangle
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SELECT CASE WHEN (A + B <= C) OR (A + C <= B) OR (B + C <= A) THEN "Not A Triangle" WHEN (A = B) AND (A = C) AND (B = C) THEN "Equilateral" WHEN (A = B) OR (B = C) OR (A = C) THEN "Isosceles" WHEN (A != B) AND (A != C) AND (B != C) THEN "Scalene" END AS triangletype FROM TRIANGLES